SF6 Gas Monitoring System Installation Guide: Best Practices for Detector Placement, Wiring & Safety

1. SF6 Gas Monitoring System – Equipment Installation Methods

1.1 SF6 Monitoring Host

      Location: GIS room entrance or control room, 1.2 – 1.5 meters above ground for easy operation and viewing.

      Method: Securely mount the bracket to the wall, then hang the host onto the bracket.

      Professional tip: Protect the host's LCD screen during construction – avoid impacts and compression.

1.2 SF6 Gas Detector

      The gas detector is the front-end sensing unit of any SF6 gas monitoring system. Its placement height directly affects leak detection speed.

      110kV GIS room: Install below the equipment, 10cm from the ground (since SF6 gas is heavier than air and accumulates at lower levels).

      35kV switchgear room: Wall-mounted installation, 10 – 15cm from the ground.

Method:

      For below-equipment installation: First secure the detector using a bracket, then fix the bracket to the floor.

      For wall installation: Directly fix the detector to the wall.

1.3 Temperature & Humidity Transmitter

      Location & Method: Identical to the SF6 gas detector (as above).

      Purpose: Helps determine whether environmental temperature/humidity changes are causing false readings or contributing to gas leakage conditions.

1.4 Fan Controller

      Location: Works together with an AC contactor, installed inside the fan power box or embedded in an adjacent control box (typical dimensions: 200mm × 250mm × 100mm).

      Method: Fix both the controller and the AC contactor securely inside the power box or embedded control box.

      Function: When the SF6 gas monitoring system detects gas leakage or low oxygen levels, the fan controller automatically activates exhaust ventilation.

1.5 Sound & Light Alarm

      Location: 10cm above the entrance eave or above the main monitoring host.

     Method: First attach the alarm light to its bracket, then mount the bracket on the wall.

     Purpose: Provides on-site visual and audible alerts for gas leakage or oxygen deficiency.

2. Construction Precautions for the SF6 Gas Monitoring System

⚠️ The following points directly affect system reliability and compliance – please follow them carefully.

• Professional wiring and debugging

All system wiring and debugging must be carried out by qualified professionals or under their direct guidance. Incorrect wiring may cause controller malfunction or false alarms.

• Protect the monitoring host LCD screen

During construction, take extra care to avoid bumping or compressing the LCD screen of the monitoring host. Damage to the screen can prevent local operation and status viewing.

• Indoor use only for standard monitoring host

The standard monitoring host is designed for indoor installation only. If outdoor use is unavoidable, the host must be installed inside a weatherproof rainproof box to prevent moisture and dust ingress.